Ethylene propylene-diene interpolymer composition

Patent metadata

Field	Value
Publication number	US-9518137-B2
Application number	US-201214364999-A
Country	US
Kind code	B2
Filing date	Nov 30, 2012
Priority date	Dec 13, 2011
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

The present disclosure is directed to a composition and articles containing the composition. The composition includes an ethylene-propylene-diene interpolymer (EPDM) having a rheology ratio greater than 33. The EPDM also has a molecular weight distribution greater than 3.0. The composition has a dissipation factor less than or equal to 0.01 radians as measured in accordance with ASTM D 150 (130° C., 60 Hz).

First claim

What is claimed is:

1. A composition comprising:
an ethylene-propylene-diene interpolymer with from 0.1 wt % to 1.0 wt % units derived from diene, the interpolymer having a rheology ratio greater than 33; and a molecular weight distribution greater than 3.0;
the composition having a dissipation factor less than or equal to 0.01 radians as measured in accordance with ASTM D 150 at a temperature of 130° C., and a frequency of 60 Hz after one week of vacuum oven heating at 60° C.

2. The composition of claim 1 wherein the ethylene-propylene-diene interpolymer is neat.

3. The composition of claim 1 wherein the ethylene-propylene-diene interpolymer comprises less than 3.5 ppm aluminum.

4. The composition of claim 1 wherein the ethylene-propylene-diene interpolymer has a Mooney viscosity greater than 18.

5. The composition of claim 1 wherein the ethylene-propylene-diene interpolymer comprises
from 60 wt % to 75 wt % units derived from ethylene;
from 15 wt % to 30 wt % units derived from propylene; and
from 0.1 wt % to 1.0 wt % units derived from diene.

6. The composition of claim 1 wherein the diene is selected from the group consisting of 5-ethylidene-2-norbornene and 5-vinylidene-2-norbornene.

7. The composition of claim 1 wherein the ethylene-propylene-diene interpolymer has a dissipation factor less than or equal to 0.01 radians as measured in accordance with ASTM D 150 at a temperature of 130° C., and a frequency of 60 Hz after one week of vacuum oven heating at 60° C.

8. The composition of claim 1 comprising
from 65 wt % to 90 wt % of the ethylene-propylene-diene interpolymer; and
from 35 wt % to 10 wt % clay.

9. The composition of claim 8 comprising an additive selected from the group consisting of filler, plasticizer, wax, thermal stabilizer, antioxidant, lead stabilizer, polyolefin, adhesion promoter, coupling agent, and combinations thereof.

10. An article comprising at least one component formed from the composition of claim 1 .

11. The composition of claim 1 wherein the ethylene-propylene-diene interpolymer has a molecular weight distribution from 4.0 to 8.0.

12. The composition of claim 1 wherein the ethylene-propylene-diene interpolymer comprises
from 1.0 ppm to less than 3.5 ppm aluminum; and
from 0.1 ppm to less than 0.3 ppm zirconium.

13. The composition of claim 1 wherein the ethylene-propylene-diene interpolymer has a rheology ratio from greater than 33 to 70.

14. The composition of claim 1 wherein the composition is boron-free.

15. The composition of claim 1 wherein the diene is 5-ethylidene-2-norbornene and the composition comprises
from 10 wt % to less than 30 wt % clay; and
an additive selected from the group consisting of filler, plasticizer, wax, thermal stabilizer, antioxidant, lead stabilizer, polyolefin, adhesion promoter, coupling agent, and combinations thereof.

16. A composition comprising:
an ethylene-propylene-diene interpolymer comprising
(i) from 60 wt % to 75 wt % units derived from ethylene;
(ii) from 15 wt % to 30 wt % units derived from propylene;
(iii) from 0.1 wt % to 1.0 wt % units derived from diene; and
(iv) from 1.0 ppm to less than 3.5 ppm aluminum; and from 0.1 ppm to less than 0.3 ppm zirconium

wherein the ethylene-propylene-diene interpolymer has
a rheology ratio greater than 33;
a dissipation factor less than or equal to 0.01 radians as measured in accordance
with ASTM D 150 at a temperature of 130° C. and a frequency of 60 Hz after one week of vacuum oven heating at 60° C.; and
a molecular weight distribution greater than 3.0; and

the composition has a dissipation factor less than or equal to 0.01 radians after one week as measured in accordance with ASTM D 150 at a temperature of 130° C., and a frequency of 60 Hz.

17. The composition of claim 16 wherein the ethylene-propylene-diene interpolymer comprises
from 65 wt % to 75 wt % units derived from ethylene;
from 20 wt % to 30 wt % units derived from propylene; and
from 0.3 wt % to 1.0 wt % units derived from diene.

18. The composition of claim 17 comprising
from 65 wt % to 90 wt % of the ethylene-propylene-diene interpolymer; and
from 35 wt % to 10 wt % clay.

Assignees

• Dow Global Technologies Llc

Inventors

• Walther Brian W
• Song Susan M
• Caronia Paul J
• Fu Lin

Classifications

• C08F2500/25

  Cycloolefine · CPC title

• C08L23/083

  with aliphatic polyenes, i.e. containing two or more carbon-to-carbon double bonds · CPC title

• C08F210/02 Primary

  Ethene · CPC title

• C08K3/00

  Use of inorganic substances as compounding ingredients · CPC title

• C08F236/20

  unconjugated · CPC title